11/08/2026

2 Gold Silver Test Acid Neutralizer 1/2 oz Bottle Testing Solution Stone Cleaner

GTE TEST ACID NEUTRALIZER 1/2 OZThis kit includes: - 2 bOTTLES OF GTE NEUTRALIZER SOLUTION (1/2 OZ PER BOTTLE) This authentic GTE Acid test Neutralizer is perfect for cleaning your test stone in between testing as to not contaminate results. Protect your fingers, clothing, and personal items from staining and potential burns with a few drops of the neutralizer! Simply use the convenient dropper bottle and squeeze 1 drop of the Neutralizer formula onto your test stone. Blot with a paper towel to prevent cross contamination with previous tests. Made in USA.
11/08/2026

JSP Gold Precipitant 8 oz Refining Test Acid Aqua Regia Metals SMB Pyrosulfite

This listing includes: - (1) JSP 8 ounce bag of Gold Precipitant 8 ounces (1/2 lb) Sodium Metabisulfite, 99% (Na2S2O5) pure food/photo grade. Also known as SMB, Pyrosulfite, and Disodium. Used in gold refining as a gold precipitant. To be used as a gold precipitant for aqua regia. Use 1 oz of SMB mixed in 20-30 ml of water per ounce of metal in the aqua regia solution to precipitate the gold. A MUST-HAVE for anyone who invests in gold, silver, or platinum!